1501:10-2-08
Underground diesel fuel storage facilities.

(B)
Diesel fuel standards. Diesel-powered equipment shall be used underground only
with fuel that meets the standards of the most recently approved U.S.
environmental protection agency guidelines for over-the-road fuel. The fuel
shall also meet the ASTM D975 fuel standards with a flash point of one hundred
degrees Fahrenheit or greater, at standard temperature and pressure. The
website for ASTM international is http://www.astm.org.
The operator shall maintain and make available to the chief for review, a copy
of the most recent delivery receipt from the supplier that will prove that the
fuel used underground meets the standards listed in this paragraph.

(2)
Have either
self-closing or automatic-closing doors, except for a short-term underground
storage facility that has no doors;

(3)
Be ventilated
directly into the return air course using noncombustible materials;

(4)
Be
equipped with an automatic fire suppression system that complies with rule
1501:10-2-12 of the
Administrative Code. A site-specific alternate method of complying with this
paragraph may be approved by the chief;

(5)
Be equipped with
at least two portable twenty-pound multipurpose dry-chemical type fire
extinguishers that are maintained in accordance with MSHA regulations;

(F)
Safety measures
related to welding and cutting. Welding or cutting shall not be done within
fifty feet of an underground diesel fuel storage facility except as provided
under paragraphs (F)(1) and (F)(2) of this rule. When it is necessary to weld,
cut or solder pipelines, cylinders, tanks or containers that may have contained
diesel fuel, the following requirements shall apply:

(1)
Cutting or
welding shall not be performed on or within containers or tanks that have
contained combustible or flammable materials until such containers or tanks
have been thoroughly purged, cleaned or inerted, and a vent or opening is
provided to allow for sufficient release of any built-up pressure before heat
is applied; and

(2)
Diesel fuel shall not be allowed to enter pipelines or
containers that have been welded, soldered, brazed or cut until the metal has
cooled to ambient temperature.